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Proceedings Paper

Internal limiting membrane layer visualization and vitreoretinal surgery guidance using a common-path OCT integrated microsurgical tool
Author(s): Xuan Liu; Eric Meisne; Jae-Ho Han; Kang Zhang; Peter Gehlbach; Russell Taylor; Jin U. Kang
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Paper Abstract

Contemporary retinal microsurgery is performed by skilled surgeons through operating microscopes, utilizing free hand techniques and manually operated micro-instruments. One technically challenging procedure is the incising and peeling of the internal limiting membrane (ILM) while minimizing damage to the underlying retina. One strategy for minimizing damage is to improve visualization of the ILM layer. Here we present a preliminary evaluation of a prototype tool that integrates an ultra high resolution Fourier domain common path Optical Coherence Tomography (OCT) with an intelligent microsurgical instrument. The tool provides OCT guided visualization of the ILM layer at the point of tissue contact by the surgical tool. We have evaluated the imaging properties of the common path OCT system. The common path OCT system used in this study has a maximum imaging depth of 1.3mm and a sensitivity of 91dB. We have achieved an experimental axial resolution of 3μm in air and this appears to be sufficient to both identify the ILM and to perform surgical maneuvers. We scanned the single mode fiber probe using an intelligent microsurgical instrument to form B-Mode images. We imaged a porcine eye with both anterior eye segment and the vitreous removed. The image obtained show distinct functional layers of retina.

Paper Details

Date Published: 2 March 2010
PDF: 4 pages
Proc. SPIE 7550, Ophthalmic Technologies XX, 755003 (2 March 2010); doi: 10.1117/12.840976
Show Author Affiliations
Xuan Liu, The Johns Hopkins Univ. (United States)
Eric Meisne, The Johns Hopkins Univ. (United States)
Jae-Ho Han, The Johns Hopkins Univ. (United States)
Kang Zhang, The Johns Hopkins Univ. (United States)
Peter Gehlbach, Wilmer Eye Institute, Johns Hopkins Univ. School of Medicine (United States)
Russell Taylor, The Johns Hopkins Univ. (United States)
Jin U. Kang, The Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 7550:
Ophthalmic Technologies XX
Fabrice Manns; Per G. Söderberg; Arthur Ho, Editor(s)

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